Alpha Treatment Key Flat Shank Jector Punches

Alpha-treated jector punches are used in injection mold tooling to help eject molded parts by driving localized contact forces through the ejector plate. Their key flat shank geometry provides secure alignment, reducing lateral wobble during repeated press cycles.

• Automotive connector and housing molds: select the Standard jector option when steady ejection force is required and you want stable sliding with improved oil retention at the contact surface.
• Small molded components with tight ejector guidance: the microtexture friction control supports consistent movement, helping maintain predictable ejection timing as parting loads rise.
• High-cycle or higher load press conditions: choose the Spring Reinforced variant to better accommodate variations in stack-up and reduce the risk of binding under load fluctuations.

The Alpha Treatment improves hardness while maintaining toughness, making this variant suitable where wear at the jector tip and stable sliding are both critical.

These jector punches are offered in multiple tool steels with Alpha Treatment to enhance surface hardness via nanocrystallization while preserving core toughness. The treated microtexture is designed to control friction and support stable sliding performance during production.

• SKH40 (powdered high-speed steel equivalent): typically selected for balanced wear resistance and toughness for general jector applications.
• SKH51 (M2 equivalent): suited where higher hardness and abrasion resistance are prioritized.
• SKD11 (D2 equivalent): commonly chosen for strong wear performance, with a toughness trade-off versus the HSS options depending on operating conditions.

Hardness level is not explicitly provided in the supplied specifications, so engineers should confirm the final HRC after Alpha Treatment and any required heat-treatment route. Manufacturing generally includes steel selection, machining of the flat shank and tip profile, then surface Alpha Treatment to create the nanocrystallized friction-controlled layer. Final polishing/finishing of the sliding surfaces is typically important to achieve consistent friction behavior.

Correct sizing ensures that the jector tip supports proper parting while the flat shank maintains alignment in the ejector system. Use the provided diameter and dimensional ranges to match your mold cavity/core and ejector plate layout.

• Shank diameter (D): select within 4 ~ 25 mm to fit the corresponding guidance hole/slot in the ejector support.
• Tip dimensions (P): choose 1 ~ 18 mm according to the required contact area shape.
• Tip length/option B: pick B = L, S, or X to reach the needed projection and support depth.
• Overall length (L): select 40 ~ 80 mm, then verify full-length alteration ranges: LC 27 ~ 90.1 mm and LCT/LMT 27 ~ 90.1 mm.

Account for dimensional alterations and tolerance behavior during design review. Tip corner radius is fixed at R = 0.15 mm; tip dimension alteration ranges (PC 0.9 ~ 9, WC sets) should be matched to your final drawing to ensure the intended contact geometry. Standard or spring reinforced jectors should be selected based on your press and stack-up stability needs.